166583566 has 4 divisors (see below), whose sum is σ = 249875352. Its totient is φ = 83291782.

The previous prime is 166583563. The next prime is 166583567. The reversal of 166583566 is 665385661.

166583566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665385661 = 17 ⋅39140333.

It is a super-2 number, since 2×166583566² = 55500168922552712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166583563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41645890 + ... + 41645893.

It is an arithmetic number, because the mean of its divisors is an integer number (62468838).

Almost surely, 2^166583566 is an apocalyptic number.

166583566 is a deficient number, since it is larger than the sum of its proper divisors (83291786).

166583566 is an equidigital number, since it uses as much as digits as its factorization.

166583566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83291785.

The product of its digits is 777600, while the sum is 46.

The square root of 166583566 is about 12906.7256110913. The cubic root of 166583566 is about 550.2297288249.

The spelling of 166583566 in words is "one hundred sixty-six million, five hundred eighty-three thousand, five hundred sixty-six".